1990 Lexus LS, Stock amp bypass

I am doing and install on a 1990 Lexus LS and as i worked my way back into the trunk, i found that there was a stock pioneer amp in the back....now what should i do in order to install the new amp(s) that im installing.. im installing 2 12" woofers, 1 8" kicker woofer for the rear deck, and three amps, (interior speakers,amp for subs,and amp for the 8" kicker)...What should I do? Let me know whas good.

Are you installing the 8" free air in the factory location?There is no such thing as free installation!

I'd recommend leaving the 8 out completely to allow the bass from the 12's a passage into the main cabin.  Are you upgrading the deck as well?My ex once told me I have a perfect face for radio.

Exactly what I was getting at.There is no such thing as free installation!